Fifty caliber tracers streaked orange above the water. Every three seconds, the entire shore line was lit up by the muzzle flash of the 76mm deck gun. In the strobe light effect of rapid fire, everything seemed to move in slow motion.
Reanimates moved jerkily through the tents, survivors stumbled backwards trying to simultaneously run and shoot back. Exactly the wrong thing to do - eight hold still and get the kill shot, or run straight out - the corpses didn't phase under suppressive fire. Three Inch high-explosive - that shredded them like slow roasted pork - but the shells would do the same thing to human beings - rendering it less than useful for close support.
Something moved from tree-top to ground in the space of a single flash. Beta. Next flash it was moving horizontally. A third boom caught in the moment of impact with a human being. By the fourth, it was gone - as well as the head of its victim.
Several humans jumped into the water, trying to swim for the cutter a quarter kilometer off shore. Most reanimates were content with easy prey, and wouldn't follow. Some, were just plain sadistic though. Unfortunately for them, the lake Michigan coast was home to a horde of the later. A rooster tail of water kicked up near the swimmers. Then another. Somewhere out there was a kappa with a mounted weapon, smart enough to keep hidden from the coast guards main battery. A few more fonts of water, and the splashing stopped.
The captain lowered his binoculars, and gave the order to cease fire. No more survivors.